carbon build up valves

My bike had been hard to start when cold, low comp.not rings, im sure its the valves, when it warms up the comp. is 120 to 125 per cylender. when cold 40 to 50 psi. i have been putting 85 octain gas in it, my friend said posibly carbon build up around the valves. is there a good additive that will clean them? and what all should i do, octain boost, add a lot of cleaner to the tank.

If not already done, thinking a leak-down test could be helpful toward diagnosis.

Good Fortune!

Engine Chemicals
Mopar Combustion Chamber Cleaner # 04318001. Designed to remove carbon from combustion chambers & valves.

www.amazon.com/Yamaha-Ring-Additive-32oz...-32-00/dp/B002GUCLH2 (Yamaha Ring Free)

Yamaha Carb Cleaner # ACC-CARBC-LE-NR

You can do the Seafoam thing on the engine when it's hot. Draw it in through the intake vacuum lines and let it sit ten minutes, then run it. It will blow a ton of carbon out.

tmstoltz wrote:

My bike had been hard to start when cold, low comp.not rings, im sure its the valves, when it warms up the comp. is 120 to 125 per cylender. when cold 40 to 50 psi. i have been putting 85 octain gas in it, my friend said posibly carbon build up around the valves. is there a good additive that will clean them? and what all should i do, octain boost, add a lot of cleaner to the tank.

A properly tuned engine will continue to run for many years if not abused, and the jetting is correct. I would deffinately fix the condition causing this issue, rather than throw a band-aid on the resulting problem.

Could be a combination of too rich at a comonly used throttle position, and oil leaking past valve seals, making for a nasty combo piling up on the valves/seats.

You can just pull off the carbs/header and have a look with a mini mirror and flashlight.

Or... you can just throw some crap in the tank every so often! :laugh:

Good luck!

somebody get otto on the stage! :woohoo:

Otto's Ointments for Ornery Engines--thats what we need.bj

take it out on the highway and run the hell out of it hard,that will clean the ol carbon out of her!

No eBay APP ID and/or Cert ID defined in Kunena configurationSince I will never live you guys down, than here it is. :lol:

Please follow the instructions in this thread.
kzrider.com/index.php?option=com_kunena&...ew&catid=2&id=369254

EDIT
Here is a reprint of my instructions on how to properly use the "Combustion Chamber Cleaner.
All of the following items will do the job the same way. I bought a case from the eBay seller because it was the most inexpensive.



This is what I do. The best way to use the "spray" combustion chamber cleaner" is to;
1) heat up the engine to full operational temperature.
2) remove the spark plugs while hot.
3) Set pistons "about" half way between TDC and BDC.
4) Spray in the cleaner until it comes out the hole.
5) replace the spark plugs immediately.
6) wait until the engine cools down, or till next morning.
7) go for a VERY BRISK ride for about half an hour.
repeat step 1-7, 3-4 times.
Now you have a clean engine
9) use the Lucas in every tank.
10) step 1-7 may or may not be required about every 10,000 mi dependent on how much oil you burn. This is what my pistons looked like after more than 24,000 miles after doing steps 1-8.

just tryed this hope it works

just tryed this good day for it.

otakar wrote:

Since I will never live you guys down, than here it is. :lol:

Please follow the instructions in this thread.
kzrider.com/index.php?option=com_kunena&...ew&catid=2&id=369254

:laugh: